Executive brief
A security vulnerability exists in the Windows Push Notification service, which handles the delivery of real-time alerts and updates to applications. An attacker who already has limited access to a computer could exploit this flaw to gain full administrative control over the system. This could allow them to view sensitive data, install malicious software, or disrupt business operations.
Technical details
A race condition (CWE-362) exists in the Windows Push Notifications service due to improper synchronization when accessing shared resources. To exploit this, an attacker must first have local access to the system with low-level privileges. By successfully winning the race condition during concurrent execution, the attacker can achieve a privilege escalation, potentially gaining SYSTEM-level access. The vulnerability is characterized by high complexity (AC:H) and requires local authentication (PR:L), but it allows for a full compromise of confidentiality, integrity, and availability.
Affected products
- Microsoft Windows Push Notifications
Timeline
- 2026-06-09: disclosed
- 2026-06-09: advisory